The Lionheart Industries Regulus Delta is a south korea-made single-action pistol chambered in 9mm Luger, introduced in 2022. Primary use: Competition, Home Defense. Type: Pistol Action: Single-Action Caliber: 9mm Luger Capacity: 9 Year introduced: 2022, South Korea Weight: 26 oz Overall length: 7.4" Status: Active Intended use: Competition, Home Defense